Emanuel muller



(No Mod 1.)

e B.- MULLER.

SELF SETTING TIME PIECE.

No. 439,419. Patented Oct. 28., 1890.

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UNITED STATES PATENT OFFICE.

EMANUEL MLLER, OF NEWv YORK, N. Y.

SELF-SETTING TIME-PIECE.

SPECIFICATION forming part of Letters Patent No. 439,419, dated October28, 1890. Application tiled December 7, 1889. Serial No. 332,944. (Nomodel.)

To all whom t may concern:

Be it known that I, EMANUEL MLLER, a resident ofthe city of New York, inthe county and Stale of New York, have invented certain new and usefulImprovements in Self-Setting Time-Pieces, of which the following is aspeci'- Iication.

This invention relates to anew attachment to clocks and othertime-pieces, whereby the same may be made self-setting orself-regulating, the idea underlying the invention being to supply thetime-piece with mechanism that will cause it to gain or lose at certainspecific intervals in the exact relation in which, without thisattachment, the timepiece would lose or gain; or, in other words, ithaving been ascertained that a certain tim epiece loses, say, sixminutes during every twenty-four hours, my improved attachment will soregulate the position of the hands as to malte the time-piece gain thesesix min utes during every twenty-four hours, in addition to the ordinaryrunning operai-ion of the time-piece. Moreover, by my improvedattachment this adjustment can be set into automatic action during everyhour of the twenty-four hours, or during any other desired subdivisionof said twenty-tour hours.

The invention consists, mainly, in the eniployment of a certaindilerential gearing by which the relation of the minute-arbor and itscontrolling' heart-cam can be properly controlled.

The invention also consists in other details of improvement andcombinations of parts, that will be hereinafter more fully specilied.

In the accompanying drawings, Figure l represents a rear elevation ofclock mechanism having my improved attachment. Fig. 2 is a sideelevation, partly in section, of the same. Fig. 3 is a detail view, onan enlarged scale, of the heart-cam and the parts controlling itsmovement. Fig. 4 is an enlarged longitudinal section of the rear portionof the movement; and Fig. 5 is a detail side view of the catch of thespring which actuates the pawl and that falls into the heart-cam.

The letterA in the drawings represents the minute-arbor of a suitableclock or other time-piece. This minute-arbor is connected with the usualmotor for turning it in the proper direction with approximatively-properspeed. At some portion of its length this minute-arbor A carries asnail-cam I, and the minute-arbor also carries a toothed wheel B, whichgears into a pinion O on an arbor D of the heart-cam E. The pinion C isloose on the arbor D, but is crowded by frictionsprings e, so as to havefrictional contact with the arbor and collar thereon, and turn the samewhenever this frictional contact is not otherwise overcome, ashereinafter stated.

In the example. whichI propose to describe for the purpose ofillustrating my invention, we will assume that the wheel B hasseventytwo teeth and that the pinion C has six teeth. It follows thatthe arbor D and the heart-cam E will be revolved twelve times duringevery single revolution of the arbor A, twelve times, therefore, duringevery hour, and once, therefore, during every live minutes. The snailcamI, revolving once every hour, controls the action of a spring II, whichin turn connects with a pawl G, that actuates the heart-cam E-that is tosay, the spring II has a tendency to lift the pawl G against theheart-cam, as in Fig. l, and is permitted to do so once an hour, whenthe snail I carries its shoulder past the angle of the springcarrier II,as in Fig. l, and when the pawl G does fly against the heart-cam itaffects the same in manner analogous to that of all heart cams; but asthe snail-cam inl moving leaves the position shown in Fig. l, itgradually crowds the spring II down, and with it the pawl G, whichconnects with said spring II by means ofthe pin g, and thus during theentire hour the pawl is away from the heartcam, as in Fig. 3, flyingagainst it only, as before stated, once during each hour, and thendropping away. The preferable position for the snail is that which willcause the pawl to strike the heart-cam when the minute-hand is oppositethe ligure 12 on the dial. As regards the spring II, the same is bypreference provided withaspring-iinger f, which, getting under thegudgeon g, lifts the pawl G, as will appear clearly from an inspectionof the lower part ofFig. 3.

The minute-arbor A is capable of sliding in its bearing.

F is a toothed wheel hung on an independent arbor opposite and near tothe wheel B, and one of these wheels has small teeth (Z,

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While the other has a iiexible facing b, but instead of this couplingdevice b d any other suitable coupling device 'may be employed, theobject being to connect the Wheels B and F Whenever the arbor A ispushed back or inward, or otherwise moved longitudinally, for the sameeffect might be produced by pulling on the arbor A. The Wheel F, for thepurpose of this example, has seventy-five teth and meshes into asix-leaf pinion a, which is rigidly fastened on the arbor D.

Now it will be perceived that during the normal action of the clockmechanism the Wheel F will be carried around by the arbor D, which inturn receives its motion through the Wheels B C, the latter beingfrictionally mounted upon the arbor D. Vhen, however, the clock is to beregulated, the arbor A is pushed to couple the Wheels B and F together,and When, now, the arbor A is turned the Wheel F will impart motion tothe arbor D, because its pinion a is rigidly mounted upon said arbor,the pinion C being only frictionally mounted; but as the Wheel F hasseventy-ve teeth and the wheel B seventy-two teeth, it follows thatwhenever the arbor A revolves by the direct coupling of Wheels B F, therelation of the heart-cam E to the minnte-hand will by such motion bedisturbed one twenty-fourth of the entire movement of the minute-handduring this act of adjustment.

Having thus described the mechanism, I Will give one example to renderits object more clear. Supposing, after Watching a certain clock orother time-piece, it is found that the same runs live minut-es too fastduring everyday. Then at anyone time-say at about twelve oclock noon-theminute-hand is taken hold of, pushed inward with its arbor, and turnedfive minutes back on the dial, Whereupon the minute-arbor is againreleased andl carried longitudinally forward into its normal position bya suitable spring m or other mechanism. While the arborA was pushedinward and turned to represent five minutes on the dial, the heart-cam Ewas turned to represent one twenty-fourth of those five min- Utes andwas brought to that extent out of its normal alignment with the minutehand. Hence at the end of every hour, when the snail-cam allows the pawlG to drop against the heartcam, this motion will cause the heart-cam toturn the minute-arbor one twenty-fourth of the Whole time Which theclock is running too fast during a day. Consequently at the end of everyhour the clock Will regulate itself to make up for lost time, or droptime gained by too-rapid motion. The same character of adjustment willtake place if the clock runs too slow instead of running too than onehour or at short-er intervals, as may be desired.

The main feature of invention of course lies in the employment of thedifferential gears B F, Whether the same be on the minute-arbor A or onany other arbor geared with the same.

What I claim, and desire to secure by Letters Patent, is-

1. In a time-piece, the longitudinally-movable arbor A, combined by thedifferentialgear-Wheels B F with a heart-cam E, and pinions C dtherefor, substantially as described, for turning the minute-arborthrough said heart-cam, substantially as described.

2. The longitudinally movable arbor A, having gear-wheel B, combinedwith the gear- Wheel F and pinions C a, constituting together adifferential gear, as described, and with means, substantially asdescribed, for coupling the Wheels B F and uncoupling the same, and Withthe heart-cam E, pawl G, and snail I, as specified.

3. The longitudinally-movable arbor A and its toothed Wheel B, combinedwith a loose pinion C, having frictional contact on the arbor D and Withthe iixed pinion a on said arbor, differential gear-wheel F, heart-camE, pawl G, and snail I, all arranged as specified.

4. The minute-arbor A of a time-piece, combined by the fric-tionalpinion C with the shaft of the adjusting heart-cam E for conjointoperation during the normal motion of the clockwork, and with thedifferential Wheel F and fixed pinion a for setting the heart-cam intothe adjusting position, and means, substantially as described, forcoupling the arbor A to the wheel F Whenever adjustment is required, asspecified.

5. In a time-piece, the minute-hand combined with its minute-arbor andwith gear- Wheels that connect the minute-arbor with the heart-cam E andwith said heart-cam, the gear-Wheels being arranged as described, sothat by moving the hand a. certain distance the Aheart-cam will beturned a given fraction of said distance, as specified.

RMANUEL MLLER.

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